Brush



A H. WEEK'S:

BRUSH APPLICATION mew AUG. M1.

Patented Aug 213,

MEWEfiSU...

ATENT OFFICE.

ADOLPH momma wnms, or ennui, n'mamsxa.

mwsn.

Specification of Letters Patent.

Patented Aug. 23, 1921.

Application at August 10, 1910. Serial No. 318,161.

To all whom it may concern:

Be it known that I, ADoLrH R. WIENS, a citizen of the United States, andresident of Omaha, in the county of Douglas and State of Nebraska, haveinvented certain new and useful Improvements in Brushes; and I do herebydeclare that the following is a full, clear, and exact descriptlonthereof.

My invention relates to new and useful improvements in brushes moreparticularly of that cylindrical type adapted for cleaning the interiorsof bottles or for similar uses, and comprising a cylindrical core formedof wood and provided with circumferential grooves in which the bristlesof the brush are secured by a wire coiled in said grooves.

In a brush of this character it is highly desirable to form the coremember of the smallest possible diameter so as to provlde for anadequate amount of bristle material Within the limitations of generaldiameter of the brush imposed by the restricted conditions under whichthe brush is to be used. Heretofore it has been found impos sible toform the brush core of the cheaper hard woods, and hickory or otherhighly expensive wood has been employed, the necessity for this type ofwood arising partlcularly from the weakening of the core structurecaused by the formation of the circumferential bristle receiving groovesor cups particularly in the tip portion of the brush, and even with theuse of this expenslve type of wood it has been necessary to provide anundesirably large diameter of the core, since otherwise the stresses towhich the brush core is subjected during the manufacture of the brushand during the subsequent use of 'the brush would procure breakage ofthe core at one of the cup portions.

It is therefore an important object of my invention to provide a brushstructure wherein a core member of very small diameter may beemployed,which need not be formed of hickory or other expensive wood and whichprovides for the disposition of a maximum amount of bristles thereaboutto provide a most highly eflicient and durable brush which is capable ofmeeting unuspally severe lateral stresses against its core portion.

A further important object is to provide a securely attached and ampleendmost tuft for the brush, which will not tangle under the severe usageto which it is subjected in working against the bottom of a bottle orlike receptacle to be cleaned. Bristles of the type used 1n a brush ofthis character are somewhat tapered, being heaviest at what is termedtheir butt end portions, WhlCl'l are drawn from the skin of the animal,and being graduall reduced toward thelr flag end portions. 11 mixin thebutt and flag end portions of the brist es at the outer portion of thetuft, such as is effected in the previous construction of brushes ofthls character, wherein the bristles are fastened at their intermediateortions and then bent outwardly, a consi erable tendency of tangling isencountered. It is therefore more particularly my object in thisconnection to provide an arrangement wherein an endmost tuft of bristlesmay be provided for the brush having the butt end portions of thebristles securely fastened to the core in such manner as to provide arelatively long endmost tuft of ample cross sectional proportion,instead of said butt end portions being doubled outwardly, and whereinthe outer portion of the tuft is thus formed entirely of the flag endsof the bristles to prevent tangling and thus materially increase thelife and efficiency of the brush.

A still further object resides in the provision of a brush structureembodying the afore recited advantages which may be manufactured at alesser cost of labor than brushes of this type heretofore used.

With the above and other objects and advantages in view, which will beapparent as .the description proceeds, my invention resides in the novelfeatures of construction, combination and arrangement of parts ashereinafter described and defined by the ap pended claims.

In the accompanying drawings:

Figure 1 is a longitudinal sectional view through a brush head showingone embodiment of my invention.

Fig. 2 is a detail sectional view through the tip showing amodifiedmeans of fastening the endmost tuft of bristles.

Referring now more particularly to the drawing 5 designates thecylindrical stem core of a brush for washing bottles or likereceptacles, said core being of the general construction embodied inbrushes of this character with the exception that its end most tip iseliminated and that the core is of smaller diameter than usually emloyed and may be formed of inferior wood compared to previousrequirements The extremity of the core is slightly reduced in diameterwith respect to the major diameter of the core and the core is taperedinwardly to a shoulder 6 having an undercut annular face, the saidtapered a1portion of the core forming a frusto-conic bristle seatingface 7, said faces 6 and 7 definin the endmost receivin groove or cup oft e core which opens ob iquely toward the extremity of the core.

Annular cups or grooves 8 and 9 are formed in the core, inwardly of saidfirst mentioned cup, the angular pitch of these cups 8 and 9 beingsuccessivel reduced, and inwardly of the cup 9,the usua s iral groove 10is cut in the core in a lura it of convolutions having its walls 'isposesubstantiall at right an les to the axis of the core for holding thebristles of the cylindrical body portion of the brush. The core isprovided with an axial bore extendin from its outer end to a point wellpast the innermost cup 9.

The endmost tuft of bristles 11 of the brush are carried by a metallicreinforcin rod 12 which is secured in the axial bore 0 the core. Thetuft 11 is formed'of bristles which have their butt portionsdisposedabout the projected end of the rod 12 and a sleeve or ferrule 13is disposed about the butt ends of the bristles whereby the bristles aregripped between the sleeve and rod, the sleeve and rod bein formed withportions procuring an inter ocking fiexure of the bristle ends withinthe sleeve. This interlocking relation is procured in the structureshown in Fig. 1 by an annular reduction 14 .of the rod12 within thesleeve which cooperates with an inwardly bowed intermediate portion ofthe sleeve, said bowed portion being formed'b turning the sleeve afterthe bristles and s eeve have been assembled on the stem. An exceedinglyeffective permanent anchora e for the tuft 11 isthus provided, where ysuch an ample quantity of bristles ma be provided by reason of theexceeding y small; diameter ofthe metallic rod 12 that I may avoid thenecessit of turning out butt end portions of the ristles into the tuft.A relatively longer tuft is thusxprovided which has its outer portionform wholly of the flag'ends of the bristles to avoid tangling of thebristles-and considerably lengthen the life of the brush in use.Suitable quantities of bristles to provide the roundin annular end tufts15 have their interme late rtions bent and disposed in the cups of tecore, the wire 16 for securin these bristles-in the eu being ancho bysecurement of the 12' at the extremity of the core. It is particularlynoted that the seating surface 7 of the core for the endmost annulartuft .15 is of such pitch that the endmost annular tuft is disposedquite closely about the endmost tuft 11,thus procuringa finishedappearance and an efiicient operation of the brush.

I have thus provided a highly eflicient brush which, with the use of asmaller diameter and inferior quality of core wood, is considerablestro'n er than brushes of this type heretofore use by reason of thetovision of the rod 12 which permits the bristle seating cups to be cutinto the stem core close to its center to procure an adequate depth ofsaid cups, the rod 12 increasing the strength of the brush structure tomeet lateral stresses. The method employed in forming my brush alsorocures an economy of labor, particularl with respect to the operationof turning t e brush to fill the cu s or grooves, which requires anexpert wor man. In my method of forming the brush, the core is providedwith cu s or grooves and a bore formed therein by t e usual wood workinoperations. The operator then takes t e rod 12 and disposes a batch ofbristles thereabout to form the tuft 11 and disposes the sleeve 13 inlace about the butt end of the bristles. he intermediate portion of thesleeve is then turned inwardly y the usual metal working operation. Therod 12 is then driven into the core and the tuft 11 thus attachedthereto without the necessity of turning the core. The skilled operatorthen mounts the core in a suitable rotating chuck and by the usualturning operation secures the annular tufts 15 in the cups of the core.By reason of the relatively large size of m endmost tuft 11 I am enabledto reduce t e number of annular oblique cups required and I effect amaterial savin of the amount of skilled work require In addition topermitting the use of a relatively chea 1 grade of hard wood in theformation 0 the core I am also enabled to effect a saving in the woodstock by reason of the lesser diameter of the core and I also effect asaving in the amount of bristles used by reason of the more advanta usrelation of the endmost tufts.

n Fig. 2 I show a modified manner of procuring the interlocking relationof the utt ends of bristle tuft 11. In this modified structure the rod12 is provided with an enlar ment 17 on its ro'ected extremit and t eend portions of the eeve 13 are bot turned in at 18 to flex the bristleends within the sleeve.

It is particularly noted that in both of my methods of securing the buttends of the bristles, a contraction is effected adjacent the buttextremities of the tips which, in addition to providing the desiredinterlocking securement also compensates for the reduction of thediameter ofthe bristles immediately adjacent the head portion which isdrawn from the skin of the animal.

While I have shown and described a prellfl be appreciated that variouschanges and modifications of structure may be employed" to meetdiffering conditions of use or manufacture Without departing in anymanner from the spirit of the invention.

l/Vhat is claimed, is:

1. A brush of the class described compris ing a Wooden stern havingcircumferentially extending bristle seating grooves adjacent one end andan axial bore in said end, a corn bined reinforcing and end tuftcarrying rod disposed in said bore and having one end projecting beyondthe end of the stem, end tuft bristles, means for securing the end tuftbristles to the exposed end of the rod, the other or shank portionthereof serving to reinforce said stern, bristles disposed in saidgrooves, and a retaining Wire Wound in the core grooves to secure thebristles therein, one end being attached to the stern and the other endanchored to said rod between the end of the stern and the end tuftbristle se curing means.

2.1K combined Wood and metallic brush head including an annular groovedWooden stem having its end centrally bored for a predetermined distanceto form a shell, a metallic rod embedded into the stern bore forming astrengthening core for the Wooden shell portion of the stern, the rodbeing provided with a head above the stern having annular faces ofdifferent diameters, a tuft of head bristles nested about the rod head,a binding ferrule incasing the bristles, convolutions of folded bodybristles seated Within the annular grooves of the wooden stem, and aWire retaining runner for the body bristles, the same being Wound tautlyabout the annular grooves of the stem to also form an exteriorreinforcement for the wooden shelldike stein, whereby its Walls Will becompressed about the metallic reinforcing rod to resist breaking strain.

In testimony that I claim the foregoing I have hereunto set my hand atOmaha, in the county of Douglas and State of Nebraska.

ADOLPH RICHARD \VIENS.

